Oil burner

In most markets of the United States, heating oil is the same specification of fuel as on-road un-dyed diesel.

This spray is usually ignited by an electric spark with the air being forced through around it at the end of a blast tube, by a fan driven by the oil burner motor.

Priming involves purging any air from the fuel lines so that a steady flow of oil can find its way to the burner.

Oil furnaces can last decades if maintained regularly ensuring the heat exchanger is vacuumed out and cleaned.

Alternatively to standard nozzles, fuel may be passed in front of a tiny orifice fed with compressed air.

Because it is only compressed air that passes through the orifice hole, such nozzles do not suffer from significant erosion.

Oil pressure is generated by an electric pump, usually driven by a capacitor start motor.

Gear pumps are used frequently in oil burners because of their simplicity, durability, and low price.

To set the heat output of the burner, the rate of fuel delivery via the nozzle must be adjustable.

When the set pressure is reached (usually 100 psi), this valve opens and allows excess oil to flow through a bypass back to the fuel tank or the pump suction side.

It also eases the purging of the burner (and any boiler) of fuel mist during startup, or while restarting after a misfire.